How to Shepardize a Case: Citation Checks and Negative Treatment

To Shepardize a case, you run its citation through a citator and read what every later court did with it. Enter the cite in Shepard's on Lexis, read the signal (a red stop sign means the case has been reversed or overruled on a point, yellow means possible negative treatment, green means positive), then open the citing decisions that carry negative treatment and confirm whether the criticism touches the specific point you are relying on. The same job is called KeyCiting on Westlaw and BCiting on Bloomberg Law.

The verb comes from Frank Shepard, who started publishing citation lists in the 1870s, and the practice is older than every tool you use to do it. What has changed is that the check now takes ninety seconds instead of an afternoon, which is exactly why skipping it has become inexcusable and, oddly, more common.

What does it mean to Shepardize a case?

Shepardizing answers two questions that reading the opinion cannot. First, is this case still good law: has a later court reversed it, overruled it, or had its reasoning superseded by statute. Second, who else has cited it, and for what, which turns one good case into a map of the whole line of authority on your issue.

The second use is underrated. Most lawyers Shepardize defensively, checking that a case they already found has not blown up. The stronger move is offensive: take the leading case in your area, pull the citing references, filter to your jurisdiction and your point of law, and you have a curated list of every court that has applied the rule you care about. That is often faster than another round of keyword searching, and it surfaces cases that share the legal issue but use none of your search terms.

How to Shepardize a case, step by step

The sequence is the same in every citator. Only the branding changes.

1. Enter the citation. Use the reporter cite rather than the case name where you can, since names collide and citations do not. In Lexis you type the cite in the search bar and select Shepardize; on Westlaw you open the case and click the KeyCite tab or the flag in the header.

2. Read the signal, then distrust it. The signal is a summary of the worst treatment anywhere in the citing history. A red flag does not mean the case is dead. It means some court, somewhere, on some point, treated it negatively. A case can be overruled on a procedural holding you are not using and remain perfectly good on the substantive rule you are citing. The signal tells you where to look, not what to conclude.

3. Filter the citing decisions. Narrow to negative treatment first, then to your jurisdiction, then to the headnote or point of law you are relying on. This is where the editorial work you are paying for earns its keep: a good citator lets you jump straight to the citing cases that discuss the specific proposition rather than reading forty decisions that cite the case in passing.

4. Open the negative treatment and read it. Every time. The classification tells you a later court distinguished or criticized the case; it does not tell you whether that criticism guts your argument. Read the passage. Ten seconds of reading here has saved more careers than any other habit in legal research.

5. Check the statute too. A case interpreting a code section that was amended last session can be flawless as an opinion and useless as authority. Citators flag superseded by statute inconsistently. If your holding turns on statutory language, pull the current text of the statute yourself.

6. Record what you checked and when. Put the date of the citator check in your research memo. Law changes between the day you research and the day you file, and a dated note is what lets the next person know how stale the answer is. Firms that keep an auditable record of what was verified and when, the same way regulated teams track the obligations they have to evidence, are the ones that do not get surprised on a supplemental brief.

Shepard's vs KeyCite vs BCite

Shepard's and KeyCite remain the two deepest citators, and no honest comparison pretends otherwise. Both are built on decades of editors classifying, case by case, how each citing decision treated the one before it. That labor is what you are buying, and it is why the enterprise platforms hold their price in a market where raw case law is free. Bloomberg's BCite is a genuine third option and comes inside a flat subscription rather than as a metered add-on, which some firms prefer.

Automated signals sit a tier below on depth and, for most day to day work, are enough. They reliably catch reversals, overrulings, and cases that later courts have savaged. Where they are weaker is nuance: distinguishing a case that has been quietly narrowed by a line of decisions from one that is merely cited often. If you are writing an appellate brief, use a full citator. If you are answering the question of whether this case still controls a motion, an automated treatment signal plus reading the negative citing cases covers it.

How do I Shepardize a case without Lexis?

Shepard's itself only exists on Lexis, so the real question is how to verify a case without paying for a Lexis seat. There are three workable routes.

Use a different citator. KeyCite on Westlaw, BCite on Bloomberg Law, Bad Law Bot on vLex Fastcase, or the treatment signal in a lighter research tool. Your bar association almost certainly bundles vLex Fastcase, so you likely have an automated citator already. Check the member portal before you buy anything, and see what Fastcase actually costs for how those bar programs work.

Use a public law library. County law libraries in most states offer patron access to Westlaw or Lexis on site, and several state law libraries provide remote database access to residents with a library card. For an occasional deep citation check this is free and complete.

Do it manually with citing references. CourtListener and Google Scholar both show which later cases cite the one you are reading. That is a raw citing list with no treatment classification, so you have to read the citing decisions yourself, but it will catch an outright reversal. It is slow and it is better than nothing. What it will not catch is a California depublication order, which strips an opinion of citable status without any court reversing it, one of the traps covered in the California case law search guide.

What the signals actually mean

Signal literacy is where most of the errors live, so it is worth being precise. A red signal covers a range of outcomes from overruled on all points to reversed on one issue in a case that is otherwise intact. A yellow signal covers everything from serious criticism to a single court distinguishing the case on facts that do not resemble yours. Neither color is a verdict.

The question that resolves it is always the same: has any court that binds mine rejected the specific proposition I am citing this case for. A Ninth Circuit panel criticizing a Second Circuit decision does not change what binds a New York district court. A 2019 state appellate decision distinguishing your case on facts you do not have is not a problem, and it may even help, because it shows the court policing the boundary of a rule that still stands inside it. Understanding which authority controls in the first place is a prerequisite, and binding vs persuasive authority covers that ground.

Frequently asked questions

What does it mean to Shepardize a case?

Shepardizing means running a case citation through a citator to see every later decision that cited it and how each one treated it. The check tells you whether the case has been reversed, overruled, distinguished, criticized, or superseded by statute, and therefore whether it is still good law for the point you want to cite it for.

How do I Shepardize a case for free?

Check whether your bar association bundles vLex Fastcase, which includes the automated Bad Law Bot negative treatment signal at no extra cost to members. County and state law libraries often provide free on site Westlaw or Lexis access. CourtListener and Google Scholar show citing references without treatment classification, so you read the citing decisions yourself.

Is KeyCite the same as Shepardizing?

They do the same job on different platforms. Shepard's is the LexisNexis citator and KeyCite is the Westlaw citator, and both report how later courts treated a decision. Lawyers use Shepardize as a generic verb for the whole task, the way people say googling for any web search, but Shepard's itself is only available on Lexis.

What does a red flag mean on a case?

A red flag or red stop sign means a later court reversed or overruled the case on at least one point, or that it has been superseded. It does not mean the whole opinion is worthless. The case may remain good law on the specific proposition you are citing, so open the negative citing decision and confirm whether the criticism reaches your point.

Do I still need to Shepardize if my research tool shows a signal?

You still need to read the negative citing decisions. Any signal, editorial or automated, is a summary that compresses a range of outcomes into one color. The signal tells you where to look. Whether the treatment affects the proposition you are relying on is a judgment only reading the citing case can settle.

Make it a reflex

The failure pattern in every sanctions order and every embarrassing supplemental brief is the same: someone found a case that said what they needed and stopped. Citation checking is the cheapest insurance in the practice of law, and it takes less time than rereading the paragraph you are about to quote. Do it on every case you cite, do it again the week you file, and note the date you did it.

If you want the signal built into the search rather than bolted on afterward, ask your question in plain English here and every cited result comes back with a still-good-law indicator attached. It is a research accelerator, not legal advice, so open the opinion and read the negative treatment yourself before you file. For the broader habit, see avoiding AI hallucinated citations.